Omron FQM1-MMA21 Manuel D’Utilisation

In this example, the interval timer is used to generate an interrupt every
2.4 ms (0.6 ms 

× 4). The default System Setup settings are used. (Inputs are

not refreshed for interrupt processing.)

When the program is being executed, the interrupt task will be executed every
2.4 ms while CIO 0002.00 is ON, as shown in the following diagram.

Interval timer

STIM

INTERVAL TIMER

Ladder Program

Generate interrupt.

Execute interrupt task.

END

• Start timer.

One-shot mode
Scheduled interrupt mode

• Read elapsed time.

First Cycle Flag
(ON for 1 cycle)

0002.00

0002.00

MOV

    #0004

   D00010

MOV

    #0006

   D00011

@STIM

      #0003

   D00010

    #0023

@STIM

      #000A

      0000
      0000

Interrupt task program

END

END

Interval timer set values:

Every 2.4 ms the interval timer 
times out and the interrupt task is 
executed.

Sets 4 for the decrementing counter
set value.

Sets 0.6 ms for the decrementing 
time interval.

The interval timer stops when 
CIO 0002.00 turns OFF.

The interval timer starts when 
CIO 0002.00 turns ON.
Task 23 hex = 35 BCD

Interrupt 
task 35

Interrupt task

CIO 0002.00

2.4 ms

2.4 ms

2.4 ms